Method for manufacturing calcined type fireproof mica tape

Abstract

The invention provides a method for manufacturing calcined type fireproof mica tape. The method includes the steps of preparing tackiness agents, preparing tackiness agent solutions, coating glass fabric with the tackiness agent solutions, gluing mica paper and the glass fabric, and carrying out baking in a dryer. The method is characterized in that baking is carried out within three periods at different temperatures. The mica tape produced with the method is free of falling, powder falling, foam generating and reverse gluing and good in breathability, the mica paper is not separated from the glass fabric after the mica tape is soaked by methylbenzene for seventy-two hours, and the temperature resistant level and the voltage withstand level of the mica tape are higher; in addition, the rate of finished products is quite high, flexibility is excellent, and various properties are more stable.

Description

technical field [0001] The invention relates to a method for manufacturing a mica tape, in particular to a method for preparing a calcined refractory mica tape. Background technique [0002] Due to the advancement of science and technology and the development of society, the country and society attach great importance to safety work. Fire-resistant cables have been used in important facilities and high-rise buildings such as aviation and navigation, petrochemical industry, railway vehicles and ships, hospitals, schools, shopping malls, entertainment venues, etc. a wide range of applications. [0003] The function of fire-resistant wire and cable is to keep power supply and lighting for a period of time when burning and igniting. Its fire-resistant performance mainly depends on a layer of refractory tape wrapped around the conductor, that is, mica tape. The main component of mica tape is mica. [0004] In order to improve its refractory grade and pressure resistance, the exi...

AI Technical Summary

Problems solved by technology

[0004] In order to improve its refractory grade and pressure resistance, the existing technology for producing refractory mica tape is to increase the mica quantity of the mica tape and reduce the rubber content, which is to produce the so-called medium rubber or less rubber mica tape, medium rubber or less rubber powder mica tape It has high mica content and good air permeability, but this kind of less glue or medium glue mica tape is easy to powder and fall off, and even the mica paper is separated from the glass fiber cloth, the breakdown voltage is small, the dielectric loss is high, and the aging resistance is poor. Seriously affected the quality of the product

[0005] In order to prevent the mica tape from falling off, falling off, and separating, some manufacturers adopt the method of increasing the glue content when producing the mica tape, which is to produce the so-called multi-adhesive mica tape, but while increasing the glue content, it also reduces the mica content. , reduces the fire resistance, and is easy to cause anti-sticking, and cannot be separated when used. When the mica tape is baked in the oven, the paper surface is very easy to foam, resulting in reduced product quality or scrap, and the yield is extremely low.